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 　 Fiber Optic Multiplexer+PCM SDH Distribution
Frame		 Transmission Power Antenna
　

　
  　
  H/TGA-410 Shortwave antenna

  Shortwave antenna consists of a couple of artificial oscillators which provide less voltage 
standing-wave ratio through the broadband matching networks. This made the antenna runs 
normally in full range of shortwave band without regulator.

  Though having a similar appearance with ordinary broadband bipolar antenna, H/TGA-410 offers much superior radiation performance.

     In low elevation case, the directivity pattern of bipolar antenna is directed, while the pattern of H/TGA-410 is elliptic. The elliptic antenna provides strong radiation at narrow side as well as at wide side. The 3000Km max communication distance makes H/TGA-410 a standard omnirange antenna in high and medium elevations.

　
　 　


　   
  
  H/TGA-410 can be set up at either plain or mountain area in horizontal shape or pyramid shape to retain the communication performance.

  As an omni range antenna, H/TGA-410 can be adopted to transmitters with average power no more than 2KW. The antenna impedance 300ohm can be transformed to 50ohm through the adaptor C or 600ohm through adaptor A and transformed to 50ohm again by adaptor B after transmission.

   The pre-set frequencies of the antenna could work normally in auto-adaptation mode without pre-tuning, which helps the set up and concealment of the communication. It can switch to standby frequency swiftly and stealthily when a working frequency is interfered.
  The antenna helps a lot on the flexible configuration of the shortwave communication system which sets in tunnels. It also enables the long-distance transmission match between transmitter and antenna.

　
　 　


　
  Features：
  • Easy set-up. Only 4 staff are needed for set up without any crane or winch. The set up a 15m-high short-wave antenna can be achieved in 4 square meters with a pulley, a rope and a 4m-long wooden pole of 6cm diameter. The first person connects the flange on the top of the pole, the second person sets the pole with the rope, the third person monitors the vertical degree of west-east direction and the fourth person monitors the vertical degree of south-north direction.

  • Easy maintenance. A hand-wheel is set at the foot of the pole to lift up and down the antenna in few minutes without climbing.

  • High transmit efficiency. The matcher and the loader keeps normally temperature even after 4-hour unbroken transmit in 2000W.

  • All VISOR points are no more than 2 in the range 2-30MHz as it is showed in the following photo.
 　
　 　


　
　

      Antenna patant